<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card class="box-card">
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe align="center" >
        <!-- 展开列 -->
        <el-table-column type="expand" label="查看权限" width="100px">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'','vertical_centar','first_right_margin_left']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级、三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环渲染二级权限 -->
                <el-row :class="[i2===0?'':'bdtop','vertical_centar']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <!-- 通过for循环渲染三级权限 -->
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id"
                    closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="序号" type="index" width="70px" align="center"></el-table-column>
        <el-table-column label="角色名称" prop="roleName" align="center"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"  align="center"></el-table-column>
        <el-table-column label="操作" align="center" width="350px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting"  size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px" >
        <el-form-item label="角色名称" prop="roleName" label-width="100px">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc" label-width="100px">
          <el-input v-model="addForm.roleDesc" type="roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed">
      <span>
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
          <el-form-item label="角色名称" prop="roleName" label-width="100px">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc" label-width="100px">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightlist" :props="treeProps" show-checkbox
      node-key='id' default-expand-all :default-checked-keys="defaultTreeKeys"
      ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="postRights" >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 即将分配权限的角色的id
      roleId: '',
      // 所有角色列表数据
      rolelist: [],
      // 所有权限列表数据
      rightlist: [],
      // 添加角色对话框是否显示
      addDialogVisible: false,
      // 编辑角色对话框是否展示
      editDialogVisible: false,
      // 分配权限对话框是否展示
      setRightDialogVisible: false,
      // 树形结构的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 树形结构中默认选中的节点数组
      defaultTreeKeys: [],
      // 添加角色的对象
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色的表单验证规则对象
      addFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          }
        ]
      },
      // 编辑角色的对象
      editForm: {
        roleId: '',
        roleName: '',
        roleDesc: ''
      },
      // 编辑角色的表单验证规则对象
      editFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('/roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 监听添加角色对话框的关闭事件 重置表单
    addDialogClosed() {
      // 重置表单
      this.$refs.addFormRef.resetFields()
    },
    // 监听编辑角色对话框的关闭事件 重置表单
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击确定按钮 添加角色 发起请求
    addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('添加角色失败')
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.$message.success('添加角色成功')
        // 添加成功后隐藏对话框
        this.addDialogVisible = false
        // 刷新用户列表
        this.getRolesList()
      })
    },

    // 展示编辑角色的对话框
    async showEditDialog(roleId) {
      const { data: res } = await this.$http.get('roles/' + roleId)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 编辑角色信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请重新输入')
        // 发起修改用户信息的请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId,
          { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) return this.$message.error('更新角色信息失败')
        //  更新成功 关闭对话框
        this.editDialogVisible = false
        // 更新数据
        this.getRolesList()
        // 提示用户
        this.$message.success('更新角色信息成功')
      })
    },
    // 删除角色
    async removeRoleById(roleId) {
      console.log(roleId)
      // 弹框询问用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?', '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)// 捕获取消行为 返回值为cancel
      // 如果用户确认删除 就返回字符串'confirm'
      if (confirmResult !== 'confirm') { // 用户点击了取消
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + roleId)
      console.log(res)
      if (res.meta.status !== 200) {
        console.log(res.meta.status)
        return this.$message.error('删除角色失败')
      }
      this.$message.success('删除角色成功')
      this.getRolesList()
    },

    // 展开列 权限的操作
    // 点击关闭按钮 根据ID删除权限
    async removeRightById(role, rightid) { // 接收角色id和权限id
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 判断是否删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightid}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      // this.getRolesList()
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      // 获取所有权限的数据
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败')
      }
      // 将获取到的权限数据保存到data中 供组件渲染
      this.rightlist = res.data
      this.$message.success('获取权限列表成功')
      // 调用递归函数 获取所有三级权限的id
      this.getThirdRightKeys(role, this.defaultTreeKeys)
      this.setRightDialogVisible = true
    },

    // 通过递归的形式获取所在角色下所有三级权限的id 并保存到数组中
    getThirdRightKeys(node, arr) {
      if (!node.children) { // 如果当前节点不包含children 是三级权限
        return arr.push(node.id)
      }
      // 如果不是三级节点
      node.children.forEach(item => this.getThirdRightKeys(item, arr))
    },

    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      // 清空
      this.defaultTreeKeys = []
    },

    // 提交权限分配
    async postRights() {
      // 获取所有选中节点和半选中节点的id值
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      // console.log(idStr)
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vertical_centar{
  display: flex;
  align-items: center;
}
.first_right_margin_left{
  margin-left: 40px;
}
</style>
